Inbound Emails
Receive and process inbound emails with attachments directly in your application via webhooks. Handle customer replies, automate support tickets, and build email-based workflows with structured JSON data from our inbound email service.
INBOX
John Doe <customer@example.com>
Question about my order
Sarah Johnson <sales@business.com>
Interested in your product
Mike Chen <info@startup.co>
Partnership opportunity
{
"event": "message.inbound",
"data": {
"from": {
"email": "customer@example.com",
"name": "John Doe"
},
"to": [
{
"email": "support@acme.com"
}
],
"subject": "Question about my order",
"body": {
"text": "Hi, I have a question..."
}
}
}What are inbound emails?
With inbound emails you can receive emails from external senders. Unlike outbound emails that you send, inbound emails allow you to automatically process incoming messages via webhooks, enabling users to email you as well.
With Lettermint Inbound Emails you can build powerful workflows like support ticket systems or tracking replies to your campaigns. Our infrastructure automatically processes incoming messages, filters spam, and delivers structured JSON data to your webhook endpoint.
Process emails as JSON via webhooks- Full support for attachments
- Perfect for customer service and support
- Use your own domain and email address
{
"from": {
"email": "customer@example.com",
"name": "John Doe"
},
"to": [
{
"email": "support@inbound.lettermint.co"
}
],
"subject": "Question about Lettermint",
"body": {
"text": "Hi, I have a question...",
},
"attachments": [
{
"filename": "copy.pdf",
"content": "JVBERi0xLjQKJ...",
"content_type": "application/pdf",
}
],
"is_spam": false,
}
Legitimate
john.smith@gmail.com
Re: Booking information
Spam
winner@lottery-scam.com
You won $1,000,000!!
Legitimate
lisa.bakker@outlook.com
[#4832] Re: Question about invoice
Spam Score: 0%
Attachment: invoice.pdf
Spam Prevention
Nobody likes spam in their inbox. With our built-in spam filtering, unwanted emails are automatically blocked before they reach your webhook. This way you only receive legitimate messages that truly matter.
You have full control over how strictly emails are filtered. Set the spam threshold to your preference, or disable filtering entirely if you prefer to handle spam yourself. Every webhook contains spam scoring information so you can decide how to process suspicious messages.
Made in Europe
Unlike most email providers that rely on US-based infrastructure, Lettermint operates exclusively within Europe. This unique approach ensures your data is protected by the world's strongest privacy laws.
From our servers to our team, everything is European. Every aspect of our service is designed with privacy and data sovereignty in mind. Your emails and customer data remain within EU borders at all times.
Europe based100% GDPR Compliant
Your data never leaves Europe
Your Data, Your Control
Full ownership of your data
European Infrastructure
Built and hosted in Europe
Loved by developers
With support like that who can help but simply loving Lettermint. EU owned and operated is a must in 2026 and working with public customers makes this even more important.
In order to increase our digital autonomy, we were looking for a reliable EU email provider. Lettermint's offers are as good as, if not better than, the competitors.
Paul Perreijn
CTO of Chipmunk HealthSolid EU email service. Netherlands-based with reliable delivery and helpful support. Does what it says, definitely switching from my current provider.
Sebastiaan Kloos
Founder of LearnkitLettermint offers a fantastic price and a hassle-free data processing agreement. Their customer service is outstanding, responding quickly even on a Sunday evening.
Mads Henrichsen
Founder & Partner at syv.aiI've been using Lettermint's transactional emails for a month now and so far I have experienced easy setup, great insight, stable deliveries & EU-based. Recommend!
Ralph J. Smit
Freelance DeveloperSwitched from Amazon SES after noticing Apple email blocks. Lettermint's dashboard is refreshingly modern, support is quick and personal, and everything stays in the Netherlands.
Serge Huijsen
Founder of Stichting VeiligSamenFrequently Asked Questions
What are inbound emails?
Inbound emails are messages sent to your application from external senders. When someone sends an email to your inbound route address, Lettermint receives it, processes the content, and forwards all data to your webhook endpoint. This allows you to automate workflows like creating support tickets, converting emails into tasks, or tracking replies to your campaigns.
What's the difference between Inbound Emails and forwarding?
Regular email forwarding simply redirects messages from one address to another without any processing. Inbound emails with Lettermint parse the entire message structure, extract headers and attachments, filter spam, and deliver structured data to your webhook endpoint. This means your application receives clean, organized JSON data instead of raw email files, making it much easier to build automated workflows.
How do I receive inbound emails in my application?
Receiving emails in your application requires setting up a webhook endpoint. When an email arrives at your inbound route, Lettermint sends a POST request to your webhook URL containing the complete message data including sender, subject, body content, and attachments. Your application can then process this data and trigger any action like creating support tickets or storing messages in your database.
Can I use my own domain for inbound email addresses?
Yes, you can configure custom domains for your inbound addresses. Instead of using the default @inbound.lettermint.co address, you can set up something like support@yourdomain.com. This requires adding an MX record to your DNS settings that points to Lettermint's inbound server. Once verified, any email sent to your custom domain will be processed and forwarded to your webhook.
Does Lettermint filter spam for inbound emails?
Yes, all incoming messages are automatically scanned using advanced spam filtering. You can configure the spam threshold to control how strictly emails are filtered. The default setting blocks obvious spam while allowing legitimate messages through. If you prefer to handle spam filtering yourself, you can disable our filtering entirely and implement your own logic. Every webhook payload includes spam scoring information, giving you full control over how to process suspicious messages.
How does pricing work for inbound emails?
Inbound emails count towards your monthly email volume, just like transactional emails and broadcast emails . Every plan includes a fixed number of emails that can be used for both sending and receiving messages. For example, the Starter plan includes 10,000 emails per month that you can split between outbound and inbound usage however you need.
Try Lettermint for free
Ensure your emails reach the right inbox with our EU-based transactional email service. Sign up now and see how Lettermint can transform your business communications.
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